Annex Help ?

[jamjar]

I,m not wanting to sound thick ,but what is the difference between ADSL 2+ Annex A and Annex M ?

 

[Berserker]

Wikipedia does it better than I could, though I suspect their bandwidth figures are 'ideal condition' numbers which never happen in practice...

ITU G.992.5 Annex M is an ITU (International Telecommunication Union) standard, also referred to as 'ADSL2+M'. ITU G.992.5 Annex M extends the capability of basic ADSL2 by doubling the number of upstream bits. The data rates can be as high as 24 Mbit/s downstream and 3.5 Mbit/s upstream depending on the distance from the DSLAM to the customer's home.

The main difference between this specification and ITU G.992.5 (ADSL2+) is that the upstream/downstream frequency split has been shifted from 138kHz up to 276kHz, allowing upstream bandwidth to be increased from 1.4 Mbit/s to 3.3 Mbit/s, with a corresponding decrease in download bandwidth.

http://en.wikipedia.org/wiki/ITU_G.992.5_Annex_M

 

[tolien]

On Be it means up to 2.5Mbps up, with some decrease in upstream.

 

[jamjar]

Wikipedia does it better than I could, though I suspect their bandwidth figures are 'ideal condition' numbers which never happen in practice...

Ok thanks thats helped a lot , so what is Be Pro service type ?

 

[tolien]

Be Pro uses ADSL2+ Annex M.

 

[jamjar]

many thanks

Be Pro uses ADSL2+ Annex M.

thanks i,m starting to see things clearer ,and i do wear glasses ,but you know what i mean ha! good info from all

 

[Phal]

If youve got a decent enough line then you can have Annex M and Fastpath enabled which means you get the extra upload with virtually no download speed loss

In my experience it does vary a lot as to where youre uploading to though! I had some tasty upload speeds of up around 200-250kbps when uploading to a decent FTP but when DCCing to mates it varied hehe from 30-60 to a mate with Pipex but sometimes around 160kbps to someone else with BE